I have 2 remote employees who office together who formerly adored each other. One of them manages the other and she is very new at management. She is also younger by 20 years. She is accusing the older subordinate of being gossipy and says she can not trust her as a team mate. The older subordinate is very much a "mother hen" and does like to be involved in everything in the office, but is also a strong team member and helps keep everyone organized.
They are 3 hours remote from me, and I foresee me having to drive there to mediate between them. Any advice to build a bridge between these 2?